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AGM plants have been through a rigorous trial and assessment programme. They are:
This plant will provide nectar and pollen for bees and the many other types of pollinating insects.
It is included in an evolving list of plants carefully researched and chosen by RHS experts. Divided into 3 groups these lists, linked below, are maintained by a team of RHS staff and are reviewed annually.
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Other common names yarrow 'King Edward'
Synonyms Achillea 'King Edward'
Family Asteraceae
Genus Achillea can be mat-forming or upright perennials, mostly herbaceous, with sometimes aromatic, pinnately divided or simple and toothed leaves and flattened clusters of small, daisy-like flower-heads
Details 'King Edward' is a compact, spreading perennial to 10cm in height, with narrow, silvery-grey leaves which often persist through the winter. Compact heads of small, buff-yellow flowers in early summer, fading to cream with age
Foliage Semi-evergreen
Habit Mat forming
Hardiness
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H5
Full Sun
Aspect South-facing or West-facing or East-facing
Exposure Exposed or Sheltered
Chalk
Sand
MoistureWell-drained
SoilChalk, Sand
pHAlkaline, Neutral
Ultimate height Up to 10 cm
Ultimate spread 0.1-0.5 metres
Time to ultimate height 2-5 years
Cultivation Grows best in moist but well-drained soil although will tolerate a wide range of conditions. Deadhead after flowering
Propagation Propagate by division in spring
Suggested planting locations and garden types Coastal Cottage & Informal Garden Gravel Garden Patio & Container Plants Rock Garden Wildlife Gardens
Pruning Cut back untidy foliage in spring
Pests Can get aphids
Diseases May suffer from powdery mildews
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